D'Angelo, John P. <br/><br/>
Mathematical thinking :  problem-solving and proofs / 
John P. D'Angelo, Douglas B. West 
 - 2nd ed. 
 - Upper Saddle River, NJ :  Prentice Hall,  2000 
 - xx, 412 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0130144126  RM385.92 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Problem solving